refactor(liquidvesting): remove trusted delegates (#215)

## Description

Closes: #XXXX

This PR removes the `trusted_delegates` from the `x/liquidvesting`
module with the logic that restricts the insurance fund to accept
deposits only from those accounts.

---

### Author Checklist

*All items are required. Please add a note to the item if the item is
not applicable and
please add links to any relevant follow up issues.*

I have...

- [x] included the correct [type
prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json)
in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR
Targeting](https://github.com/milkyway-labs/milkyway/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building
modules](https://docs.cosmos.network/v0.44/building-modules/intro.html)
- [ ] included the necessary unit and integration
[tests](https://github.com/milkyway-labs/milkyway/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go
code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [x] reviewed "Files changed" and left comments if necessary
- [x] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable
and please add
your handle next to the items reviewed if you only reviewed selected
items.*

I have...

- [ ] confirmed the correct [type
prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json)
in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

(cherry picked from commit c0e4365)

app/upgrades/v3/upgrades.go

@@ -58,10 +58,6 @@ func CreateUpgradeHandler(
 		if err != nil {
 			return nil, err
 		}
-		liquidVestingParams.TrustedDelegates = []string{
-			"celestia1nyk8qsfkrplvzex5yc4l5kghdr60nj7mutnw6z", // goose self-delegation address
-			"celestia1vre9kvtw6w9lxkl3620zpzs5lpczhvjc0s6r2a", // bot address
-		}
 		err = keepers.LiquidVestingKeeper.SetParams(ctx, liquidVestingParams)
 		if err != nil {
 			return nil, err

app/upgrades/v3/upgrades_test.go

@@ -121,12 +121,8 @@ func (suite *UpgradeTestSuite) TestUpgradeV3() {
 		sdk.NewInt64Coin("ibc/8D4FC51F696E03711B9B37A5787FB89BD2DDBAF788813478B002D552A12F9157", 1000000),
 	), rewardsParams.RewardsPlanCreationFee)
 
-	liquidVestingParams, err := suite.App.LiquidVestingKeeper.GetParams(suite.Ctx)
+	_, err = suite.App.LiquidVestingKeeper.GetParams(suite.Ctx)
 	suite.Require().NoError(err)
-	suite.Require().Equal([]string{
-		"celestia1nyk8qsfkrplvzex5yc4l5kghdr60nj7mutnw6z",
-		"celestia1vre9kvtw6w9lxkl3620zpzs5lpczhvjc0s6r2a",
-	}, liquidVestingParams.TrustedDelegates)
 
 	slashingParams, err := suite.App.SlashingKeeper.GetParams(suite.Ctx)
 	suite.Require().NoError(err)

proto/milkyway/liquidvesting/v1/params.proto

@@ -8,6 +8,9 @@ option go_package = "github.com/milkyway-labs/milkyway/v3/x/liquidvesting/types"
 
 // Params defines the parameters for the module.
 message Params {
+  // List of fields that have been removed and should not be used.
+  reserved 4;
+
   // This value represents the percentage that needs to be sent to the
   // insurance fund in order to restake a certain amount of locked tokens.
   // For example, if this value is 2%, a user must send 2 tokens to
@@ -28,11 +31,6 @@ message Params {
   repeated string minters = 3
       [ (cosmos_proto.scalar) = "cosmos.AddressString" ];
 
-  // TrustedDelegates represents the list of users who are allowed to deposit
-  // on the insurance fund.
-  repeated string trusted_delegates = 4
-      [ (cosmos_proto.scalar) = "cosmos.AddressString" ];
-
   // List of channels from which is allowed to receive deposits to the insurance
   // fund.
   repeated string allowed_channels = 5;

x/liquidvesting/keeper/burn_test.go

@@ -235,7 +235,6 @@ func (suite *KeeperTestSuite) TestKeeper_TestIsBurner() {
 					[]string{"cosmos1pgzph9rze2j2xxavx4n7pdhxlkgsq7raqh8hre"},
 					nil,
 					nil,
-					nil,
 				))
 				suite.Assert().NoError(err)
 			},